The problem may not even be with lichess. It may also be with you. Read this article on network issues:
support.microsoft.com/en-us/topic/10-tips-to-help-improve-your-wireless-network-d28bf4e4-cf8c-e66f-efab-4b098459f298
support.microsoft.com/en-us/topic/10-tips-to-help-improve-your-wireless-network-d28bf4e4-cf8c-e66f-efab-4b098459f298